Piston for deep-well pumps



(No Model.) 7

G. HOD$0N.

PISTON FOR DEEP WELL PUMPS.

No. 337,495. Patented Mar. 9, 1886.

OI Q I v Q p H PATENT FFICE.

GEORGE HODSON, OF BRADFORD, PENNSYLVANIA.

' PISTON FOR DEEP-WELL PUMPS.

5PECIFZCATION forming part of Letters Patent No. 337,496, dated March 9,1886.

Application filed October 10, 1883. Serial No. 108,765. (No model.)

To aZZ whom it may concern.-

Be it known that I, GEORGE HoDsoN, a citizen of the United States,residing at Bradford, in the county of McKean and State of Pennsylvania,have invented certain new and useful Improvements in Pistons forDeep-Well Pumps, of which the following isa specification, referencebeing had therein to the accompanying drawings.

The lower or standing valve in Artesian wells often becomes clogged withsand, and the sand rising'with the liquid becomes embedded in theleather of the cups which are used in the wor-kiiig-valve,and soon cutsout the leather and scores channels in the working-barrel. My inventionis designed to obviate these difficulties by preventing the saudfromrising above the lower valve; and it consists in providing the lowervalves with sieves, which are effectual in keeping back the sand, but

7 will soon become clogged therewith and prevent any passage of theliquid, and in combining with said sieves or strainers a number of shotnormally resting thereon, the attrition of said shot as they rise andfall serving to prevent the clogging of said strainers, substantially ashereinafter set forth.

In the drawings, Figure 1 is a View in elevation of my improved valve.Fig. 2 is a longitudinal sectional view. Fig. 3 is a View, partly insection, of the cage. Figs. 4, 5, and 6 are views of the sieves.

The valve is made in three parts, of which the upper part, A, is thecage, and will be hereinafter more fully described. The three parts arefastened together with screw-threads, as shown in Fig. 2 of thedrawings. The packing F surrounds the lower part, 0, and is generallymade of leather rings. It is intended to fit tightly into the lower partof the working-barrel. The packing F is supported upon the shoulder 0and is forced down upon it by the section B. The lower end of theportion 0 is pierced with the holes 0, which form the first strainer, asecond strainer, G, made of wire gauze, interposed between the sectionsB and O. A. second sieve, H, is placed in the upper portion of thesection 13 immediately below the valve-seat D. In the chambers formedbetween the sieves H and Gand the sieve G and the perforated bottom ofsection Oh Itplace about twelve (12) common leaden S O I.

The cage in section A differs from ordinarv cages in being made solidand then perforated with the holes a. This prevents any particles largerthan said holes a from gettinginside to interfere with the ball-valve E.This cage is made in two formsone with the pin I, as shown in Fig. 2,and the other with the interior thread, K, as shown in Fig. 3-the firstor Fig. 2 being adapted more particularly for the upper valve, and theform shown in Fig. 3 being better suited for the lower or standingvalve. at the top, and it may be perforated or not with holes at thesides for the passage of liquid. This portion L forms a basket orrivetcatcher, so as to intercept any broken rivets which may drop from asucker-rod and pre vent their falling into the valve.

In case the basket L is not perforated upon its sides, it should be madesmall enough to allow free passage of the liquid around it.

The parts A L are in one piece, as shown.

What I claim as my invention is-- 1. The combination of a strainer in apumppiston with a number of shot normally resting thereon, the attritionof said shot as they rise and fall serving to prevent the clogging ofsaid strainer, substantially as set forth.

2. The piston in three sections, the upper one provided with theperforated parts A. L, in combination with the valve proper, E, thestrainers c G H, and the shot which rest 011 two of said strainers,substantially as set forth.

In testimony whereof I affix my signature in presence of two witnesses.

GEORGE HODSON.

Witnesses:

F. W. PERKINS, J AMES 0. Boilers.

The upper portion, L, is made open-

